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  1. ah, yes, that would be the other alternative. But...

    ah, yes, that would be the other alternative. But I'm not sure how clean the level on the port pins is? or does it really matter? those xmegas are starting to look real nice with their built in DAC...
  2. Poll: yes, thank you. right, I talked to a guy I...

    yes, thank you.

    right, I talked to a guy I know who works with CAN extensively, he claims that it should be relatively easy but requires MCP2515 interface chip and PCA82C250 CAN transceiver. I'll...
  3. Poll: no, but I was at fry's the other day and they had...

    no, but I was at fry's the other day and they had a converter to ISO input .. it supported many makes and it seemed that the way to customize it for a make was to change between a set of resistors it...
  4. Poll: yeah, most likely the resistor ladder is the same...

    yeah, most likely the resistor ladder is the same across all hondas. do you know where a copy of the electrical manual for your honda is?
  5. Poll: Right, cars with modern buses such as iBus don't...

    Right, cars with modern buses such as iBus don't need this. The VW, I'm assuming doesn't have this and probably uses the same resistor ladder. Well, let me know once he gets it so we can figure out...
  6. Poll: Universal Steering Wheel to USB Controller + More

    Hello,

    We've almost finished the Toyota/Scion Steering Wheel to USB controller, but along the way, I discovered many other makes use the same resistive ladder system.

    Let's begin by summarizing...
  7. okay, so we actually have some options... 1)...

    okay, so we actually have some options...

    1) we can design the board as is. the problem of course is the cost, since i'll have to order about 100 units of pcbs, parts and assembly.. but if we can...
  8. good news, I've figured out how to get AVRUSB to...

    good news, I've figured out how to get AVRUSB to show up as a composite device (apparently no one has done this before? or it isn't documented anyway), which means we probably should actually...
  9. yeah, i saw that. I am thinking about adding a...

    yeah, i saw that. I am thinking about adding a voltage divider to the OPT ADC3 line, then we can connect ILL+ to it and know the brightness illumination of the car. it just _feels_ like I'm wasting a...
  10. Ok, all things considered, I think we'll just...

    Ok, all things considered, I think we'll just stick with the ATMEGA.

    However, I see a problem.. on the ATMEGA88 datasheet:
    ATmega48/88/168: 0 - 10 MHz @ 2.7 - 5.5V, 0 - 20 MHz @ 4.5 - 5.5V
    ...
  11. Interesting. Well, there is the AT90USB646: ...

    Interesting. Well, there is the AT90USB646:

    http://parts.digikey.com/1/parts/565245-ic-avr-mcu-64k-64qfn-at90usb646-16mu.html

    While it isn't cheap (maybe 3-4x a cheap atmega), if it supports...
  12. Price on this chip alone is a bit, high, $15: ...

    Price on this chip alone is a bit, high, $15:

    http://parts.digikey.com/1/parts/565243-ic-avr-mcu-128k-64tqfp-at90usb1287-16au.html

    ATMEGA32Ux is probably likely to be about 2.90 which would be...
  13. yeah, but the bootloader implementation requires...

    yeah, but the bootloader implementation requires libusb32, rather than just HID
  14. Well, yes, we could just use one of these...

    Well, yes, we could just use one of these development boards, but then the point of this project, among other things is to have a single component that is dedicated to the task. The other thing...
  15. ok fixed board......

    ok fixed board...
    http://www.mp3car.com/vbulletin/imagehosting/thum_15620349a3cc6b209b9.jpg

    and BOM
    http://www.mp3car.com/vbulletin/imagehosting/thum_15620349a3cca77cc64.jpg
  16. oh.. oops. it did, but i think i moved it because...

    oh.. oops. it did, but i think i moved it because the DRC complained about the restrict pad under the usb when i was moving it on the pcb.
  17. new board...

    new board
    http://www.mp3car.com/vbulletin/imagehosting/thum_15620349a3b529e00d0.jpg

    ok, I rerouted the ground traces and fixed the ground planes. I left the AGND plane on the top layer because...
  18. board with ground layers, and rerouted...

    board with ground layers, and rerouted VCC/GNDhttp://www.mp3car.com/vbulletin/imagehosting/thum_15620349a33949ee164.jpg


    I'll see about the enclosure.
  19. output of 2-wire steering control is not discrete...

    output of 2-wire steering control is not discrete digital, but a range of voltages controlled by a resistor ladder.
  20. edit: see above, oops =)

    edit: see above, oops =)
  21. Okay, i'll disconnect the shield. The tantal caps...

    Okay, i'll disconnect the shield. The tantal caps are available at 805 and 402, though at 402 they are very expensive (i think it was almost $2 / cap.), at 0805 we're talking about 33 cents per cap. ...
  22. ok, new design again... this time for a 1" x 1"...

    ok, new design again... this time for a 1" x 1" board.

    board
    http://www.mp3car.com/vbulletin/imagehosting/thum_15620349a259ebe5753.jpg

    schematic...
  23. Ok, I'll keep all these things in mind when I fix...

    Ok, I'll keep all these things in mind when I fix the board tonight. Thanks for being patient, it's my first time designing this smd stuff, well, and professional pcb stuff.
  24. Ok, I'll take D2 out. AVR041/042 says to use a...

    Ok, I'll take D2 out. AVR041/042 says to use a cap for each pair of vcc pins, so I just followed the appsheet =/. I chose to use a 0 ohm resistor instead of a via because I felt the resistor would be...
  25. new schematic...

    new schematic
    http://www.mp3car.com/vbulletin/imagehosting/thum_156203499fdd9305821.jpg

    new board
    http://www.mp3car.com/vbulletin/imagehosting/thum_156203499fdde4ad2c8.jpg

    new render...
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